Wadi Al-Ula is a valley in western Saudi Arabia. There is a group of ruins about 4 km from the modern city of Al-Ula, where the ruins of the ancient city of Dedan are located about 4 km from the oasis of the modern city of Al-Ula. These ruins are the remains of a former capital of the Kingdom of Dadan, Which was prosperous from 800 BC to the first century. At this time, the valley was a stop on the spice route. Agriculture and sheep herding were the main economic products of the valley inhabitants in those days, and the walls of the valley are covered with ancient paintings.